LibJIT - GNU Project - Free Software Foundation (FSF)

LibJIT is a library that provides generic Just-In-Time compiler functionality independent of any particular bytecode, language, or runtime. It started off as a part of the DotGNU project and was used as the backend for DotGNU Portable.NET JIT engine. Since then it has been used in a number of other projects not related to DotGNU and became a separate project on its own right.